Results 31 to 40 of about 7,783 (291)

Technology of mercury removal from exhaust from coal fired boilers [PDF]

E3S Web of Conferences, 2021
For the Polish power industry, the basic fuel is hard coal and lignite, which contains significant amounts of mercury. Current emission standards in the European Union (IED directive and in the near future BAT conclusions) create conditions for ...
Łuszkiewicz Dariusz, Jędrusik Maria, Świerczok Arkadiusz   +2 more
doaj   +1 more source

Mechanisms of CO and CO₂ Production during the Low-Temperature Oxidation of Coal: Molecular Simulations and Experimental Research

Fire, 2023
The spontaneous combustion of coal caused by oxidation often leads to catastrophic fires. However, the understanding of oxidized carbon gas as a predictor of coal’s spontaneous combustion is still in its infancy.
Yongjing Wang, Yong Sun, Lihui Dai, Kun Wang, Gang Cheng   +4 more
doaj   +1 more source

Influences of Four Kinds of Surfactants on Biodegradations of Tar-Rich Coal in the Ordos Basin by Bacillus bicheniformis

Microorganisms, 2023
The biodegradation of tar-rich coal in the Ordos Basin was carried out by Bacillus licheniformis (B. licheniformis) under actions of four kinds of surfactants, namely, a biological surfactant (Rh), a nonionic surfactant (Triton X-100), an anionic ...
Wensheng Shen, Xiangrong Liu, Chen Shi, Jie Yang, Shunsheng Zhao, Zaiwen Yang, Dan Wang   +6 more
doaj   +1 more source

Characterization of humic acids from original coal and its oxidization production

Scientific Reports, 2021
Five coal samples obtained from Chinese coal-producing areas were oxidized by hydrogen peroxide (H2O2), and humic acids (HAs) were derived from original coal and its oxidizition samples.
Shuangdui Yan, Naiyu Zhang, Juan Li, Yanan Wang, Yue Liu, Mengyao Cao, Qiuyan Yan   +6 more
doaj   +1 more source

Experimental research on the fire-fighting effects of CO₂ on the recrudescence process of oxidized coal

矿业科学学报, 2021
In order to master the fire-extinguishing efficiency of different concentrations of CO2 on the oxidized coal re-combustion, a self-developed coal spontaneous oxidation program temperature increasing experimental device was adopted to study the inhibitory
Guo Zhiguo, Wang Rong, Zhang Jun, Chen Rongfang, Zhou Lingjian   +4 more
doaj   +1 more source

Effect of Physical and Chemical Structure of Shengli Lignite on Its Spontaneous Combustion Tendency

Taiyuan Ligong Daxue xuebao, 2021
A series of oxidized coal samples were prepared by oxidation of Shengli lignite in air at 140 ℃ and 160 ℃ for different time. The functional groups and pore structure parameters of coal samples were analyzed and tested by Fourier transform infrared ...
Lin GAO, Qiong MO, Junjie LIAO, Liping CHANG, Weiren BAO   +4 more
doaj   +1 more source

Experimental study on the effect of room temperature pre-oxidized time on spontaneous combustion characteristics of coal

Scientific Reports, 2023
The presence of different types of coal at room temperature can lead to self-heating of coal, potentially resulting in spontaneous combustion. To investigate the effect of ambient temperature pre-oxidation (BL) time on the self-combustion characteristics
Xun Zhang, Huimin Liang, Ge Huang, Bing Lu, Chen Yu, Jiahui Zou   +5 more
doaj   +1 more source

Microphotograph of the end face of the oxidized coal sample and crack extraction.

, 2022
Microphotograph of the end face of the oxidized coal sample and crack extraction.
Ke Gao (1521607), Shengnan Li (345816), Xiaoqi Wang (164823), Heng Ma (240045), Xuesong Yang (175061), Xiaohan Qi (12107098)   +5 more
core   +1 more source

Studies on the Oxidative Degradation of Coal.(II)

Journal of the Fuel Society of Japan, 1958
従来不確定なものとされているフミソ酸の分子量について再検討するために, まず有機溶媒の氷点降下法について得られる分子量値の意味について考察した。カルボキシル基, 水酸基を持っ芳香族系化合物およびそれらの誘導体をモデル物質とし, これらの化合物による有機溶媒 (P-フェノール, アセトアマイドなど) の氷点降下現象を観察し, ついでフミソ酸およびその誘導体ならびに石炭の溶剤抽出物による氷点降下を測定した。これらの諸実験の結果を総合すると, P-ニトロフェノールの氷点降下より算出されるフミソ酸の分子量 (約300) は, R.'S.Smithらの所説のように, フミン酸が溶媒中で開裂するために得られる過小値であり, 一方アセトアマイド中で得られる分子量 (約500～600) は ...
Kajiyama, Sigeru, Yokokawa, Chikao, Watabe, Yoshihisa, Takegami, Yoshinobu   +3 more
openaire   +4 more sources

Status and prospects of oxidized/low rank coal flotation research

Meitan xuebao
The research progress of oxidized/low rank coal flotation technology is of great significance to improve the utilization efficiency of coal resources. An overview of the research progress on the flotation technology of oxidized/low rank coal is presented,
Hengfei CHEN, Xianshu DONG, Yujin SUN, Xiangning BU, Yuping FAN, Guichuan YE, Jinpu LI   +6 more
doaj   +1 more source